A conveyor oven according to some embodiments has a first mode and a second mode of operation and includes a tunnel in which food is cooked, a conveyor for moving the food through the tunnel, a first set and a second set of one or more burners, each set configured to generate heat for the tunnel, an
A conveyor oven according to some embodiments has a first mode and a second mode of operation and includes a tunnel in which food is cooked, a conveyor for moving the food through the tunnel, a first set and a second set of one or more burners, each set configured to generate heat for the tunnel, and a controller responsive to the detection of an absence of food in the tunnel, the controller configured to change operation of the first set of one or more burners and the second set of one or more burners from the first mode of operation to the second mode of operation based at least in part upon the detection of the absence of food product from the tunnel.
대표청구항▼
1. A conveyor oven having a first mode and a second mode of operation, the conveyor oven comprising: a tunnel in which food is cooked;a conveyor moveable to convey the food through the tunnel;a first set of one or more heating elements to generate heat for the tunnel, wherein the first set of one or
1. A conveyor oven having a first mode and a second mode of operation, the conveyor oven comprising: a tunnel in which food is cooked;a conveyor moveable to convey the food through the tunnel;a first set of one or more heating elements to generate heat for the tunnel, wherein the first set of one or more heating elements is operable at a first output during the first mode of operation and is variable to a different output in the second mode of operation;a second set of one or more heating elements to generate heat for the tunnel, the second set of one or more heating elements operating at a first output during the first mode of operation and is turned off in the second mode of operation; anda controller responsive to the detection of the absence of food in the tunnel and to a temperature of the tunnel, wherein the controller (i) changes operation of the first set of one or more heating elements and the second set of one or more heating elements from the first mode of operation to the second mode of operation based at least in part upon the detection of the absence of food product from the tunnel, and (ii) adjusts the output of the first set of one or more heating elements based at least in part upon changes in the temperature of the tunnel to maintain the tunnel at substantially a steady state temperature in the second mode of operation. 2. The conveyor oven of claim 1, further comprising a fan to circulate air within the tunnel, wherein the speed of the fan is variable between the first mode of operation and the second mode of operation. 3. The conveyor oven of claim 2, wherein the speed of the fan in the second mode of operation is less than the speed of the fan in the first mode of operation. 4. The conveyor oven of claim 1, wherein the first set of one or more heating elements comprises a first set of one or more burners and the second set of one or more heating elements comprises a second set of one or more burners, the conveyor oven further comprising a first valve to regulate flow of gas to the first set of one or more burners and a second valve to regulate flow of gas to the second set of one or more burners. 5. The conveyor oven of claim 1, wherein the controller changes operation of the first set of one or more heating elements and the second set of one or more heating elements between the first mode of operation and the second mode of operation based upon passage of a predetermined period of time indicating the absence of food in the tunnel. 6. The conveyor oven of claim 1, wherein the change in temperature of the tunnel is due at least in part to the absence of food from the tunnel. 7. The conveyor oven of claim 1, wherein the steady state temperature is a cooking temperature. 8. A conveyor oven having a first mode and a second mode of operation, the conveyor oven comprising: a tunnel in which food is cooked;a conveyor moveable to convey the food through the tunnel;a first set of one or more burners to generate heat for the tunnel;a first valve to regulate the flow of gas to the first set of one or more burners, where gas flows through the first valve at a first flow rate during the first mode of operation and is variable to a different flow rate during the second mode of operation, wherein the first valve allows at least some gas to flow therethrough at the different flow rate;a second set of one or more burners to generate heat for the tunnel;a second valve to regulate the flow of gas to the second set of one or more burners, where gas flows through the second valve at a first flow rate during the first mode of operation and is prevented from flowing therethrough during the second mode of operation; anda controller responsive to a signal associated with an absence of food in the tunnel and to a temperature of the tunnel, wherein the controller adjusts (i) the first valve and the second valve between the first mode of operation and the second mode of operation based at least in part upon the signal, and (ii) the flow of gas through the first valve to maintain the tunnel at substantially a steady state temperature in the second mode of operation based at least in part on changes in the temperature of the tunnel. 9. The conveyor oven of claim 8, further comprising a fan for circulating air within the tunnel, wherein the speed of the fan is adjustable between the first mode of operation and the second mode of operation. 10. The conveyor oven of claim 9, wherein the speed of the fan in the second mode of operation is less than the speed of the fan in the first mode of operation. 11. The conveyor oven of claim 8, wherein the controller changes operation of the first set of one or more burners and the second set of one or more burners between the first mode of operation and the second mode of operation based upon passage of a predetermined period of time indicating the absence of food in the tunnel. 12. The conveyor oven of claim 8, wherein the change in temperature of the tunnel is due at least in part to the absence of food from the tunnel. 13. The conveyor oven of claim 8, wherein the steady state temperature is a cooking temperature. 14. A conveyor oven for cooking food product having a first and second mode of operation, the conveyor oven comprising: a tunnel in which food is cooked;a conveyor for moving the food through the tunnel;a heat source operable to generate heat to be provided to the tunnel, wherein the heat source comprises a first set of one or more heating elements and a second set of one or more heating elements;a fan operable to move air in the tunnel; andat least one controller that controls at least one of the fan and the heat source, andis responsive to the detection of the absence of food from the tunnel and to a temperature of the tunnel, wherein the controller changes the oven from the first mode of operation to the second mode of operation based at least in part upon the detection of the absence of food product from the tunnel, and in the second mode of operation (i) the fan moves air in the tunnel at a speed that is reduced from the speed of the fan when the oven was in the first mode of operation, (ii) the output of the first set of one or more heating elements is adjusted in response to a change in temperature in the tunnel to maintain the oven substantially at a first steady state temperature, and (iii) the second set of one or more heating elements is turned off. 15. The conveyor oven of claim 14, further comprising an input device that transmits information indicating food product is to be cooked. 16. The conveyor oven of claim 14, wherein the first set of one or more heating elements comprises a first set of one or more burners and the second set of one or more heating elements comprises a second set of one or more burners, the conveyor oven further comprising a first valve to regulate flow of gas to the first set of one or more burners and a second valve to regulate flow of gas to the second set of one or more burners. 17. The conveyor oven of claim 14, wherein the controller changes operation of the first set of one or more heating elements and the second set of one or more heating elements between the first mode of operation and the second mode of operation based upon passage of a first predetermined period of time indicating the absence of food in the tunnel. 18. The conveyor oven of claim 14, wherein the change in temperature of the tunnel is due at least in part to the absence of food from the tunnel. 19. The conveyor oven of claim 14, wherein the steady state temperature is a cooking temperature. 20. The conveyor oven of claim 17, wherein the controller changes the oven from the second mode of operation to a third mode of operation after the passage of a second period of time indicating the absence of food from the tunnel, wherein in the third mode of operation the output of the first set of one or more heating elements is reduced to maintain the tunnel substantially at a second steady state temperature that is lower than the first steady state temperature. 21. The conveyor oven of claim 20, wherein the controller changes the oven from the third mode of operation to a fourth mode of operation after the passage of a third period of time indicating the absence of food product from the tunnel, wherein in the fourth mode of operation the first set of one or more heating elements is turned off. 22. The conveyor oven of claim 14, wherein the tunnel is apportioned into a first segment and a second segment with the first set of one or more heating elements disposed in the first segment and the second set of one or more heating elements is disposed in the second segment, each segment has a sensor to detect a temperature within said segment, and the controller is responsive to feedback from the sensors indicating the temperature in each segment. 23. The conveyor oven of claim 22, wherein during the first mode of operation the output of the first set of one or more burners is controlled independently of the output of the second set of one or more burners based on feedback from the sensors indicating a temperature in each of the first and second segments. 24. A conveyor oven for cooking food product having a first, second, third and fourth mode of operation, the conveyor oven comprising: a tunnel in which food is cooked in the first mode of operation;a conveyor for moving the food through the tunnel;a heat source operable to generate heat to be provided to the tunnel such that the tunnel is maintained substantially at a first steady state temperature in the first mode of operation;a fan operable to move air in the tunnel; andat least one controller that controls at least one of the fan and the heat source, andis responsive to the detection of the absence of food from the tunnel and to a temperature of the tunnel, wherein the controller changes the oven from (a) the first mode of operation to the second mode of operation based at least in part upon the passage of a first period of time indicating the absence of food product from the tunnel, wherein in the second mode of operation (i) the fan moves air in the tunnel at a speed that is reduced from the speed of the fan when the oven was in the first mode of operation and (ii) the output of the heat source is adjusted in response to a change in temperature in the tunnel to maintain the oven substantially at the first steady state temperature, (b) the second mode of operation to a third mode of operation based at least in part upon the passage of a second period of time indicating the absence of food from the tunnel, wherein in the third mode of operation the output of the heat source is reduced to maintain the oven substantially at a second steady state temperature that is lower than the first steady state temperature, and (c) the third mode of operation to the fourth mode of operation based at least in part upon the passage of a third period of time indicating the absence of food from the tunnel, wherein in the fourth mode of operation the heat source is turned off. 25. The conveyor oven of claim 24, wherein in the third mode of operation the conveyor is turned off. 26. The conveyor oven of claim 24, wherein in the fourth mode of operation the fan is turned off.
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